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Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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Truing a small grinding wheel on the drill press
I inherited a little 1/4 inch shank brown unknown abrasive grinding wheel from
my father, well worn. So I trued it. I placed the drill press base and column on the bench and added the cross vise. No screws yet. I put the diamond truing tool in the vise, along the steps with the jaws removed. I added the head, stopped at the top of the column. I added the wheel, tightening the chuck firmly. I moved the vise to the side and screwed it two steps off center, then slid the vise over to the right. I lowered the head to place it near the wheel. I adjusted the cross slide so the diamond was after top dead center, that is, the closest point, to avoid a catch. I slid the long feed by hand using the ruler to get a start. I ran the wheel down along the diamond, removing an excessively heavy cut. I stopped. The wheel was way out. I got a high spot touch and took a cut. Nice. What a friggin' mess. I had particles in my hair, on the adjacent table, and the floor. I probably breathed some. I guarded the cut with my hand and continued to feed with the long feed. At one point the diamond glowed red. Oops. C + O2 = C O2. Lost some expensive diamond that way. Eventually I got that nice crisp sound and gave it up. Soon I will mount the accessory table to the cross vise, clamp the Unimat spindle head in the vise, clamp a bicycle crank extractor bolt in the three jaw chuck, and tilt the table to present the work to the wheel at an angle. Then I'll take off a little to make the bolt fit the dust cap Harris sold me, to form a one key extractor with an 8 mm hex key fitting. The work will spin, driven by the wheel, and stay true. Harris didn't have any extractors so they sent me parts that were close. They are quite convenient, and are a security risk for those parking in high risk areas. Oh, by the way, it looks like smoochie and I are buying a house together. Maybe out in Sterling near the airport and the bike trail. 4BR, 1B rambler, $265,000. Cookin' with gas again after 24 years. My physics project at NVCC: Google Groups, then "dgoncz" and some of: ultracapacitor bicycle fluorescent flywheel inverter |
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